Evolution of the space-charge layer during electrochemical deposition with convection

Fleury, Vincent; Kaufman, James H.; Hibbert, Brynn

doi:10.1103/physreve.48.3831

Cited by 39 publications

(13 citation statements)

References 25 publications

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“…It is well known that the strong electric fields at the dendrite tips give rise to electro-osmotic velocity fields in the system [45][46][47]. To simplify the treatment and bring out the essential 042302-9 physics of electrodeposition, we have chosen not to include fluid dynamics and advection in our model.…”

Section: Discussionmentioning

confidence: 99%

Sharp-interface model of electrodeposition and ramified growth

Nielsen

Bruus

2015

Phys. Rev. E

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We present a sharp-interface model of two-dimensional ramified growth during quasisteady electrodeposition. Our model differs from previous modeling methods in that it includes the important effects of extended spacecharge regions and nonlinear electrode reactions. The electrokinetics is described by a continuum model, but the discrete nature of the ions is taken into account by adding a random noise term to the electrode current. The model is validated by comparing its behavior in the initial stage with the predictions of a linear stability analysis. The main limitations of the model are the restriction to two dimensions and the assumption of quasisteady transport.

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Section: Discussionmentioning

confidence: 99%

Sharp-interface model of electrodeposition and ramified growth

Nielsen

Bruus

2015

Phys. Rev. E

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“…Metal deposition is destabilized by electroconvection because the instability produces a nonuniform flux of ions to the electrode surface. Electrochemical reduction of ions in regions of high convective flux (i.e., "hot-spots") produces rapid growth of nonplanar, fractal-like dendritic electrodeposit morphologies (35)(36)(37), as illustrated in Fig. 1A.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous and field-induced crystallographic reorientation of metal electrodeposits at battery anodes

et al. 2020

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The propensity of metal anodes of contemporary interest (e.g., Li, Al, Na, and Zn) to form non-planar, dendritic morphologies during battery charging is a fundamental barrier to achievement of full reversibility. We experimentally investigate the origins of dendritic electrodeposition of Zn, Cu, and Li in a three-electrode electrochemical cell bounded at one end by a rotating disc electrode. We find that the classical picture of ion depletion–induced growth of dendrites is valid in dilute electrolytes but is essentially irrelevant in the concentrated (≥1 M) electrolytes typically used in rechargeable batteries. Using Zn as an example, we find that ion depletion at the mass transport limit may be overcome by spontaneous reorientation of Zn crystallites from orientations parallel to the electrode surface to dominantly homeotropic orientations, which appear to facilitate contact with cations outside the depletion layer. This chemotaxis-like process causes obvious texturing and increases the porosity of metal electrodeposits.

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“…Therefore, the intercept of a plot of D vs. L −1 is the diffusion coefficient corrected for finite size effects (infinite dilution limit). Fleury et al [ 30 ] incorporated electro-convection and advection of ions in the fluid flow along with diffusion and electromigration, leading to a reduction in the size of the Chazalviel charge layer. The growth of zinc electrodeposits was studied experimentally in both linear [ 14 , 20 ] and circular [ 31 ] geometries, and simulated using a stochastic model based on the dielectric breakdown model (DBM).…”

Section: Resultsmentioning

confidence: 99%

Random Spacing between Metal Tree Electrodeposits in Linear DLA Arrays

Tannous

Anouti

Sultan

2018

Entropy

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When we examine the random growth of trees along a linear alley in a rural area, we wonder what governs the location of those trees, and hence the distance between adjacent ones. The same question arises when we observe the growth of metal electro-deposition trees along a linear cathode in a rectangular film of solution. We carry out different sets of experiments wherein zinc trees are grown by electrolysis from a linear graphite cathode in a 2D film of zinc sulfate solution toward a thick zinc metal anode. We measure the distance between adjacent trees, calculate the average for each set, and correlate the latter with probability and entropy. We also obtain a computational image of the grown trees as a function of parameters such as the cell size, number of particles, and sticking probability. The dependence of average distance on concentration is studied and assessed.

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Evolution of the space-charge layer during electrochemical deposition with convection

Cited by 39 publications

References 25 publications

Sharp-interface model of electrodeposition and ramified growth

Sharp-interface model of electrodeposition and ramified growth

Spontaneous and field-induced crystallographic reorientation of metal electrodeposits at battery anodes

Random Spacing between Metal Tree Electrodeposits in Linear DLA Arrays

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